did ex-gf members made the right business decision by not joining Viviz?

Sowon wanted to act, she was probably done with the idol life.

Yuju I am sure was waiting to do solo, she wanted to sing full songs.

Yerin may be the one that may be regretting it, I do not know, I don't think she has the voice to be a solo act, she is funny, so I expected her to do more TV shows.

Yuju is doing pretty good, Sublime is also managing Yerin pretty well, but Sowon got dropped from her agency from all we've seen and that's unfortunate but she doesn't have the acting chops yet so she probably made the biggest mistake but that doesn't mean she can't make it still

If we just talk about what would have been more profitable (not what they preferred or wanted ) then I think it would have been better to reboot and make Gfriend 2.0 than to break into solos

I won't say about the others. Yuju's choice to become solo is fully justified. Should have done that in 2018.

Wasn't Viviz formed after the other 3 girls had already been signed? The company also was created around that time so I dont think it would've worked.